There is also a thread on the official forums:
http://en.sfml-dev.org/forums/index.php?topic=5311.0. I use it to make
announcements and answer questions, but if you want to report an
issue, please consider using the Github tracker. I sometimes forget
bugs and suggestions that I read on the forums.

The documentation should now be complete, but if you need more
detailed information, the SFML 2 documentation may be useful.